van backfires when accelerates on 2004 Mercury Monterey

my engines wont accelerate at normal temperatures,I have had the engine check and they said that piston#2 was misfirind.I have change the spak plugs and wires and st first does ok but after a while it begins hestating when accelerating,could u give me some possible solutions?

by in Terrell, TX on August 22, 2009
4 answers
ANSWER by on August 22, 2009
With the check engine light on if the misfire is severe the check engine light will flash indicating catalytic converter damage is or will occur. It is best to attend to the misfire as soon as possible before it does secondary damage. The misfire could be due to a bad fuel injector, failed ignition coil, a vacuum leak, compression problem in that cylinder, a burned valve ect... The engine has probably gone into "limp mode" to protect itself.
ANSWER by on July 12, 2010
try the catalatic converter or clean the egr valve or idle control motor or ignition control module
ANSWER by on January 28, 2011
this mite be a injector that's gone bad, it when to me
ANSWER by on August 19, 2013
had dealer look at this problem several times before they diagnosed a faulty spark plug wire back up under the dash

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